Svantek SV 971A User Manual

SV 971A User Manual – Appendixes
208
Normal operating mode
SV 971A in configuration with the SV 18A microphone preamplifier and ACO 7152 microphone with following
settings: measurement range - Normal or Low (path: <Menu> / Measurement / Range – see Chapter 4.6),
Microphone compensation - On, Field Compensation - Free Field, Windscreen compensation - Off (path:
<Menu> / Measurement / Compensation Filter – see Chapter 4.7).
Conformance testing
This chapter contains the information needed to conduct conformance testing according to the specified
standards.
Mounting for acoustical tests The microphone must be mounted on the preamplifier.
Electrical substitute for the microphone To obtain an electrical input, the microphone must be
replaced by an microphone electrical equivalent impedance
ST 03 with 18 pF@100kOhm ± 10%.
Note: For acoustic conformance tests with the installed SA 22 windscreen, the Windscreen
compensation must be On.
Periodical test upper frequency 8 kHz
Linear operating ranges
Two measuring ranges are available: Normal and Low.
The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below. For
the Low measurement range and A weighting linearity test at 31.5 Hz, the starting point is 79 dB.
Table C.1.1. Linear operating ranges for the Normal measurement range (for the sinusoidal signal and
microphone sensitivity 32 mV/Pa)
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31.5 Hz
27
97
27
120
27
134
34
137
27
97
27
120
27
134
30
100
53
137
500 Hz
27
133
27
136
27
137
34
137
27
133
27
136
27
137
30
136
53
140
1 kHz
27
137
27
137
27
137
34
137
27
137
27
137
27
137
30
140
53
140
4 kHz
27
138
27
136
27
136
34
137
27
138
27
136
27
136
30
141
53
139
8 kHz
27
136
27
134
27
134
34
137
27
136
27
134
27
134
30
139
53
137
12.5 kHz
27
132
27
131
27
131
34
137
27
132
27
131
27
131
30
135
53
134

Svantek SV 971A Specifications

General

Brand	Svantek
Model	SV 971A
Category	Measuring Instruments
Language	English